Printer s quoin



J. F. PERRY.

PRINTERS QUoIN. y

Patented Dec. 4, 894.

4 (No Model.)

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quoin which will securely lock the type witht ter the ends of a tightening rod C, provided' JOHN F. PERRY, OF

PATENT CHICAGO, ILLINOIS.

PRINTERS QUOIN.

SPECIFICATION formingpart of Letters Patent No. 530,124, dated December 4, 1894.

Application filed March 10, 1894.

To all whom it may concern.:

Be it known that I, JOHN. F. PERRY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have inventedcertainnew and useful Improve.- ments in Printers Quoins; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Myinvention relates t-o an improvementin printers quoins. A

The object of my invention is to produce a out any sliding movement of the quoin against the furniture and at the same time will be free from the serious disadvantages inherent in those devices of the same class of which I have any knowledge.

The invention consists of such features, details of construction and combinations of parts as will first be described in connection with the accompanying drawings, and then particularly pointed out in the claims.

In the drawings-Figure I is a perspective view of my device in its open position with key adj usted for use. Fig. 2 is a top plan view of my device in its closed position. Fig. 3 is a cross-section on line .fr-rr, Fig. 2. Fig. 4 is a horizontal section on line fy-y, Fig. l.

Referring to the drawings, A are bearing pieces, each having sides a sloping from the center toward each end, these side pieces being recessed at the center on their inner edges as shown at a', for a purpose hereinafter described. Between -the bearing pieces are placed apair of wedges B each provided with downward and upward extending projections b which enter the spaces between the sides a of the bearing pieces A and serve to guide the wedges in their longitudinal movement. Each wedge is provided withl a central axial hole which is threaded. Into these holes en- With a central collar c which is rotatable in the recess a in the bearing pieces. The

tightening rod is threaded at each' side of the collar, one of these threads c being right, handed and the other thread, c2, being lefthanded. One end of the tightening rod C is longer than the 'other and is provided with a ball, e3 through which passes a pin, c, at right Serial No. 503,169. (No model.)

angles to the length of the rod C, the ball being screwed or otherwise secured to the rod.

In assembling the parts thus far described, the wedges B are screwed onto their respective ends of the tightening rod C and the ball c3 then attached to the rod, after which the wedges are placed between the two bearing pieces A. For the purpose of holding the various parts in their relative positions, the projections b of the wedges are provided on one side with grooves b which extend parallel with the inclined faces of the wedges, and into these grooves project a series of pins or studs D which pass through one of the sides of each bearing piece, as will be clear from the drawings. y

In using the quoin, the tightening rod C is turned until the Wedges are screwed outward to their full extent, one of the wedges being stopped by its outer end contacting with the ball c3 which thus stops further rotation of the tightening rod and prevents the dissembling of the quoin, which otherwise might occur.

The quoin is now in its narrowest condition and may be inserted in the chase, after which the form is locked by turning the rod C so as to pull the Wedges inward, thereby crowding the bearing pieces A, apart, the limit of movement in this direction being when the inner ends of the wedges each abut against the collar c. As there would be great diculty in turning the rod C by the fingers, I provide a key E which has a socket at e adapted to receive the ball c8 being also provided with transverse slots, as shown at c', into which slots enter the ends of the pin c4. By this arrangement the rod C may be turned with ease, since the ball and socket joint between the rod and key permits the latter to be held at an angle to the rod.

I am aware that quoins have heretofore been made in which the bearing pieces were forced apartby wedges operated by a central tightening rod, but in all these of which I have any knowledge the whole load carried by the bearing pieces and wedges tended to compress the tightening rod and hence to spring it, to

'overcomewhich disadvantage itwas necessary xooY to make the said rod of large diameter relative to the wedges, thelatter thus being weakened by their large threaded holes and liable o break when subjected to the heavy strains necessary in locking large forms. Moreover, the said previous construction had no provision for a rapid operation of the tightening rod.

In myimproved device the above disadvantages are overcome, since the strain on the tightening rod is one of tension, thus allowing the said rod to be of minimum diameter and entirely beyond all danger of springing, either when the quoin is being tightened or when being loosened. For the latter event the load on the bearing pieces tends to slide the wedges outward and thus keepsa tensile strain on the rod until the quoin is sufliciently reduced to be entirely freed from its load.

Another advantage of my construction is that all the inclined bearing faces may be made fiat without difficulty, thus reducing the cost of manufacture.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a quoin, the combination with a pair of bearing pieces, each provided with sides sloping outward from their central portions and with recesses in the inner central edges of their sides, of a pair of wedges having upward and downward projections provided on their sides with grooves parallel to the inclined faces of the wedges, said wedges being located between the bearing pieces with their wider ends outward, a series of pins projecting from the bearing pieces into the grooves in the wedges, a tightening rod provided with a collar rotatable in the recesses, said tightening rod being threaded into both wedges, the threads being respectively right and left handed, a ball secured to one end of the rod, and a transverse pin passing through the ball, substantially as and for the purpose set forth.

2. In a quoin, the combination, with a pair of bearing pieces, each provided with sides sloping outward from their central portions and with recesses in the inner central edges of their sides, of a pair of wedges located between the bearing pieces with their wider ends outward, a tightening rod provided with a collar rotatable in the recesses,the said tightening rod being threaded into both wedges, the threads being respectively right and left handed a ball on one end of the rod, and a pin passing transversely through the ball, substantially as and for the purpose set forth.

In testimony whereof Ialix my signature in presence of two Witnesses.

JOI-IN F. PERRY.

Witnesses:

HARRY N. CULVER, MoR'roN T. OULVER. 

